96. CONVOLVULACE.^. 



induplicate-valvate and whole limb plaited. Stamens 5, rarely 4, 

 visually at the base of the tube, sometimes unequal, included or exsert, 

 pollen often with points or prickles. Disc annular entire or lobed or 

 almost obsolete. Ovary superior of 2 (rarely 3-5) carpels, 1- or usually 

 .2- or by the formation of false septa -i-celled, styles 1-2 or almost nil, 

 terminal or rarely {Dicliondra) from between lobes of the ovary, style- 

 lobes or stigmas various. Ovules 2 in each carpel, collateral, erect, 

 basal, sessile, more or less anati-opous, micropyle directed doAvn and 

 outwards, integument 1. Fruit various, rarely {Dichondra) of nutlets. 

 Seeds 4-1, albumen or scanty, cotyledons foliaceous and plaited ; in 

 Cuscuta embryo spiral peripheral, cotyledons rudimentary. 



Germination usvially, or always, epigeal, the expanded cotyledons 

 very frequently retuse or 2-lobed or palminerved. 



(^ Plants with well-developed leaves. Tnfrastaminal scales 

 (1-15) :- 

 I. Ovary deeply divided. Fruit of 2 nutlets : — 



A small creepinsr herb 1- Dichondra. 



II. Ovary entire. Fruit not divided into nutlets ;2-15; : — 

 A. Style or styles elons^ate. Petals not lobed (2-14) : — 



1. Styles 2, or style deeply 2-partite : — 



Styles 2 undivided, stigmas capitate . . . .2. Cresm. 

 Styles or stj^le-divisions 2-fid, stigmas linear or 



clavate. Prostrate herb 3. Ecolciiliis. 



2. Style 1, undivided up to the stigmas :— 



a. Fruit indehiscent ; baccate, coriaceous or crus- 

 taceous. Sepals often fleshy in fruit or coria- 

 ceous, never brittle (4-6) : — 

 i. Stigma with linear or oblong lobes. Fruit dry, 



finally breaking up 4. Rivea. 



ii. Stigma with rounded lobes : — 



Ovary 4-celled. Fruit dry or baccate . . 5. Argyreia. 



Ovarj^ 2-celled. Fruit usually baccate . . 6. Leffsomia. 

 b^ Fruit usually dehiscent with valves, sometimes 

 with very thin pericarp irregularly breaking up, 

 sometimes with exocarp separating from a 

 membranous endocarp. Sepals sometimes dry 

 and brittle when capsule not valvular (7-14) : — 

 i. Sepals small, enlarged into wings in fruit : — 

 Climbers with small white flowers (in our 



species) 7. Fomna. 



ii. Sepals sometimes slightly accrescent, but not 



wing-like in fruit. Flowers never very 



small : — 



• * Stigma with two rounded lobes. Ovary 3- 



celled in Tpomcea, sec. Pharbitig, 4-celled 



in sec. Ba^a^as, 2-celled in others (8-11) : — 



! Corolla tubular or salver-shaped. Stamens 



exserted (capsule with false partitions 



between the seeds in 9 and 10) : — 



Corolla tubular from a narrowly-tubular 



base, orange 8. Mina, 



Corolla salver-shaped with very long tube, 



white or purple. Stems often muricate. 9. Calonijction, 

 Corolla salver-shaped with m.s. rather 

 swollen tube, red, yellow or white. 

 Slender herbs, never muricate . . 10. Quamoclif. 

 !! Corolla campanulate or funnel-shaped. 

 Stamens included : — 

 Sepals usually similar, not usually her- 

 baceous. Capsule usually valvular, but 

 sometimes irregularly breaking up . 11. Ipomoea. 



583 



